mirror of
https://github.com/MariaDB/server.git
synced 2025-08-01 03:47:19 +03:00
0a5668f512
The issue here is that end_of_file for encrypted temporary IO_CACHE (used by filesort) is updated using lseek. Encryption adds storage overhead and hides it from the caller by recalculating offsets and lengths. Two different IO_CACHE cannot possibly modify the same file because the encryption key is randomly generated and stored in the IO_CACHE. So when the tempfiles are encrypted DO NOT use lseek to change end_of_file. Further observations about updating end_of_file using lseek 1) The end_of_file update is only used for binlog index files 2) The whole point is to update file length when the file was modified via a different file descriptor. 3) The temporary IO_CACHE files can never be modified via a different file descriptor. 4) For encrypted temporary IO_CACHE, end_of_file should not be updated with lseek
2 lines
23 B
Plaintext
2 lines
23 B
Plaintext
--encrypt-tmp_files=ON
|